Results 111 to 120 of about 661 (149)

Dual targeting of cytokine storm and viral replication in COVID-19 by plant-derived steroidal pregnanes: An in silico perspective [PDF]

Computers in Biology and Medicine, 2021
Gideon Ampoma Gyebi, Oludare M Ogunyemi
exaly   +2 more sources

Some of the next articles are maybe not open access.

Related searches:

Pregnanes and pregnane glycosides from Marsdenia roylei

Phytochemistry, 2003
Two pregnanes namely desacylkondurangogenin C (1) and deniagenin (3, new) and two new pregnane glycosides designated as denin (5) and marsin (12) have been isolated from chloroform soluble extract of dried stem of Marsdenia roylei. Chemical and spectroscopic evidences are consistent with the structures of deniagenin, denin and marsin as 3beta, 11alpha,
Vijay S, Gupta, Alok, Kumar, Desh, Deepak, Anakshi, Khare, Naveen K, Khare   +4 more
openaire   +2 more sources

Pregnane and pregnane tetraglycoside fromMarsdenia roylei

Natural Product Research, 2011
Pregnane oligoglycoside, namely roylinine, and a pregnane derivative, namely marsgenin, have been isolated from chloroform-soluble extract of dried stem of Marsdenia roylei, and their structures were determined using ¹H-NMR, ¹³C-NMR, ¹H-¹H COSY, HSQC, TOCSY and FABMS spectral techniques as well as chemical degradation and derivatisation.
Versha, Gupta, Alok, Kumar, Anakshi, Khare, Naveen K, Khare   +3 more
openaire   +2 more sources

Photooxygenation of Pregnanes

Helvetica Chimica Acta, 2004
AbstractThe course of the singlet‐oxygen reaction with pregn‐17(20)‐enes and pregn‐5,17(20)‐dienes was studied to compare the reactivity of the two alkene moieties present in some steroid families. Thus, from commercially available (3β,5α)‐hydroxy‐androstan‐17‐one and (3β)‐3‐hydroxyandrost‐5‐en‐17‐one, the following 3‐{[(tert‐butyl)dimethylsilyl]oxy ...
María A. Ponce, Rosa Erra‐Balsells, Andrea C. Bruttomesso, Eduardo G. Gros   +3 more
openaire   +1 more source

Biosynthesis of Pregnane Derivatives

1971
Publisher Summary Pregnane derivatives are not only important in their own right but also occupy a central position in steroid biochemistry because they serve as precursors of steroids possessing other types of biological activities—such as the androgenic and estrogenic hormones in vertebrates and the cardenolides. Pregnane compounds appear in nature
S, Burstein, M, Gut
openaire   +2 more sources

Pregnan-7-ol and Pregnan-12-ol

Nature, 1951
Ruff and Reichstein1 have described a pregnan-7-ol and a pregnan-12-ol prepared by Wolff–Kishner reduction of acetoxypregnane ketones. They state that these two substances are probably the 7α- and 12α-hydroxy compounds; but since epimerization during Wolff–Kishner reduction is not excluded, they name them provisionally ‘7ξ’ and ‘12ξ’2.
openaire   +2 more sources

Synthesis of pregnane derivatives

Chemistry of Natural Compounds, 1984
Pregnane derivatives have been obtained from the cyanohydrins of androst-4-en-3, 17-dione and of 3β-acetoxyandrost-5-en-17-one. It has been shown that when both a nitrile group and an ethylenedioxy group are present in an androstane derivative a Grignard reaction in anisole takes place simultaneously at the two groups.
E. V. Popova, V. A. Andryushina, G. S. Grinenko   +2 more
openaire   +1 more source

Pregnane glycosides from Hemidesmus indicus

Phytochemistry, 1994
Three new pregnane oligoglycosides, medidesmine, hemisine and desmisine isolated from the plant Hemidesmus indicus were identified as sarcostin-3-O-alpha-D-glucopyranosyl (1 --> 4)-O-beta-D-digitoxopyranosyl (1 --> 4)-O-beta-D-oleandropyranoside, calogenin-3-O-beta-D-cymaropyranosyl (1 --> 4)-O[3-O-methyl]beta-D-glucopyranosyl (1 --> 4)-O-beta-D ...
D, Deepak, S, Srivastava, A, Khare
openaire   +2 more sources

Pregnane glycosides from Stapelia variegata

Phytochemistry, 1995
Eleven new pregnane ester glycosides have been isolated from the aerial parts of Stapelia variegata. Eight of the recognized compounds were established to possess the same trioside moiety, viz. 3-O-[3-O-methyl-6-deoxy-beta-D-allopyranosyl-(1-4)-beta-D- cymaropyranosyl-(1-4)-beta-D-cymaropyranoside]. These compounds were identified as: stavaroside A: 12-
K A, el Sayed, A F, Halim, A M, Zaghloul, J D, McChesney, M P, Stone, M, Voehler, K, Hayashi   +6 more
openaire   +2 more sources

Pregnane glycosides from Cynanchum atratum

Steroids, 2008
Five new pregnane glycosides, cynanosides K-O (1-5) with a 14,15-seco-pregnane-type skeleton as the aglycon, together with five known compounds, cynascyroside C, sublanceoside E(1), sublanceoside I(1), atratoside A and atratoside B, were isolated from the roots of Cynanchum atratum.
Hong, Bai, Wei, Li, Kazuo, Koike
openaire   +2 more sources